Innovative sensor design for prevention of bio-fouling

Sensors used for in-situ water monitoring are subject to biological fouling, siltation, and scaling [3]. Fouling causes inaccurate measurements. Sensor maintenance is resource intensive. Techniques that lengthen the maintenance interval will improve measurements and conserve resources. Materials, mechanical apparatus and biocides were evaluated to determine effectiveness in improving measurements and reducing maintenance. Test panels were placed in various locations and evaluated. Mechanical wipers and shutters were designed and tested. Photographs taken at intervals were used to estimate stages of fouling and the effectiveness of various preventive techniques. Campbell Scientific has developed a new sensor design incorporating several features that improve on conventional designs.